Resistor-supporting means



' 1' '0 all whom it nun 001mm Patented Feb. 13, i923- 1,444,940 PATENT OFFICE.

Application filed June 8,

Be it known that I, THoMAs-A: Ran), citizen of the United States, anda resident of,Pittsburgh' in the county of Allegheny'andgstate of vented a new and useful Improvement in Resistor-Supporting Means, of which the followingis a specification. v l 3' My invention relates to-electric furnaces and particularly to electric resistance'furnaces, and it bias for its object to rovide a relatively simplea inexpensi've and easily manufactured resistor supporting means for electric resistance furnaces In'practicin myihventiom' I 'rovidea pliirality of 'at refractory'mie'm rs each having a plurality of relatively small alined recesses in one-or more surfaces thereof. I.

provide a -metallic resistor member which a is preferably of relatively lar e cross-sectional'area, and is provided wit a plurality of crimped or offset portions adapted to be located in said recessesto prevent movement of said resistor member relatively to said refractory supportin member. The refractory supporting mem bers are adapted to operate also as a muillefor the furnace chamber. Y

In the single sheet of drawings, Figure 1 is a view, in vertical cross-section. of an electric resistance furnace comprising-a device embodying my invention; Fig. 2 a top plan view of a heating element embodying my invention, and

Figf-"tl js a view, partly in section and partly'in-"s ide elevation, of the members illustrated in Fig. 2. V I

An electric resistance furnace 1 comprises: an outer metallic framework or casing 2 and a plurality of supporting members 3. Outer walls 4 comprise a plurality of bricks r blocks of suitable heat insulating matcrial. Inner walls 53 comprise a plurality of bricks or blocks of a suitable highly'rcfractory material. The walls are suit- J ablyifspaced apart to provide a furnace chamber 6 of any suitahle or desired contour and dimensions. 1

Pennsylvania, have inmom 1;. Ban), or rmsnonan, rmmsnvaml assmnon TO wn's'rmonooss morale a moracwonmo COMPANY, acoarom'rxoN-or rmmsnvam BESISTOB-SUPPOQII NG MEANS.

192i. Serial 414301.

bers 7 is provided on either one or both of its fiat surfaces with a plurality of ,rela-' tively member While I have illustrated the member 7 as'being'provide'd with recesses 8 substantially rectangular in contour, I do small recesses 8, which arealined. both longitudinally and laterally of the adapted to withstand the I relatively high temperature which-it is. desirecbto mamtain in the'furnace The re'sistor 9 is so bent as to comprise aplurality of substantially straight convolutions 10 which are connected by means of small integral end connections 11. The portions 10 are each provided with a plurality of offset or crimped portions 12 adapted to be located in the recesses 8. While I have illustrated longitudinally of the rectangular member 7,

I may, if this becomes necessary ordesirablc,

recesses'8 are outhc under side while the members 7 at the sides of the furnace chamber are so placed that the recesses 8 are adjacrnt to the side walls of the furnace. If the lmttom members 7 are placed in position first. it being understood that the resistor member. 9 isiin its operative )osition on the member 7, the members 7 located at the sides of the furnace may next be placed in position, the back of the members 7 being provided with a peripheral shoulder 13 to permit of resting the vertically extending members 'i' thereon. The members 7. adjacent to the ceiling of the furnace, may now be placed in position. being supported by the side members, and by the end walls of the furnace in any suitable or desired manner.

It is to bc'undcrsl'ioil'that the refractory resistor-sopporting members may be made of ilifl'crent proportimrsand dimensions and that they may be combined to form furnace chambers of different proportions and dimensions in a manncr well known in the art.

It may be noted that the device embodya resistor, the convolutions of which extend ing my invention provides a relatively 'ple and easily molded refraetory resistorsupporting member in which, incertain po- 1 sitions of the member relatively to the furnace, the furnace Walls cooperate with the member to maintain the metallic resistor in its proper operative position. v

It may he noted that the plurality of relaing a preformed metallic, x'esistor either laterally or longitudinally of the resistor supporting member, and with the erimped per-- tions' of the resistor operatively engaging the recesses, substantially preventmotion of the resistor relatively to the resistor sup-V porting member. r 4

Various modifications may be made in the device embodying my invention without ,departing from the spirit-and scope thereof and I desire that-only such limitationsv shall be placed thejreon as are imposedfby the prior art or are specifically set. fol-thin the r appended claims.

Irclaim as m invention-2 a r 1. Ali-electric resistor'supporting means comprising a refractory member having la plurality of rows of relatively smalli'ecesses in one surface thereof, the recesses being operatively 'alined in'two directions.

2. An electric resistor supporting means comprising a; refi'aetoi'y memberhaving a plurality ofrows of relatively small receses in a surface thereof, the recesses in adjacent rows beinrr svuiinetrically aligned lo u;:itudi-:

"0'. nally of said-member.

a 3. In an electric heating element, in'comhination; a resistor supporting means comprising a refractory plate having'a plurality of rows of alined relatively small recesses on its surface, and a resistor plaoeahlein proper operative position on said plate hy a movement substantially at right angles to the surface of said plate.

4. An electric resistor supporting means tively' small alinetl rece$es permit of l0ca. t-.

comprising a refractory member having a j-plurality of alined relatively: small recesses in a surface thereof, said recesses being symmetrically alined longitudinally and laterally of said member; 4 I V 5. An electric heating element comprise ing a refractory late having a plurality of rows of'alined re atively small recesses in its surface and at resistor'me nberlocated mainly on the surface of said plate and having erimped portions thereof loeated in said reoesses, s

6.;An electric furnace comprising a [Ill 1: rality of walls spaced apart to form a cha-m' her, a refractory plate in saidjehamher substantiallynparallel to one (if said walls and spaced apart therefro1 |i, and havinga pluralityof alined, relatively small recesses in the surface'facing said wall," and a resistor member 'locabed between said 'plate and said wall and having a plurality of crimped portionslocated in said recesses,

stantial movement of said resistor on said plate in .hoth lateral and longitudinal directions thereof.

In testimony whereof, I l ave hcreunto. subscribed my name this 19th day of May,

THOMAS 'A. REID. 

